Basic switch with M12 connector for position switch 3SE51 Metal enclosure 40 mm according to EN 50041. Device connection with M12 connector, 5-pole, fixed 1 NO/2 NC quick action contacts (2 NC and PE connected) Max. 125 V, 4 A Pin1=21, Pin4=22 Pin2=31, Pin5=32 Pin3=PE. Suitable for connection to all SIMATIC ET200* compact block I/O modules.